Yakuman DS is a mahjong game for the Nintendo DS produced by Nintendo. Yakuman DS is based on the Chinese game Mahjong, featuring various Mario characters. The game was released in 2005 by Nintendo. One year later, Nintendo released the game again with an online mode, with the name of Wi-Fi Taiō Yakuman DS.

The difficulty of each opponent is shown in the game with stars; The more stars that opponent has, the harder he/she is. Every opponent has different stats of Attack (Effort on winning the hand), Luck, Skill (Good strategy), Speed (Speed on declaring ron (ロン) or tsumo (ツモ)and Defense (Effort on preventing others to win). They all have different AI, and their style of play is described briefly behind the character's picture in the upper screen (while in the character selection screen). The opponents are:

Goomba: 1 Star. Still doesn't understand mahjong very well but he may sometimes win the game.

Princess Daisy: 3 Stars. She will try to use riichi to add an extra yaku and also do a closed tsumo. She will always look for a win.

Free mode- In free mode the player can freely choose CPU opponents to play against, the players can use their own rules.

Challenge mode- Win by fulfilling a given set of conditions with a given set of opponents. Easy, normal, hard and expert challenges are available, with Wario and Waluigi being unlocked after completing all the Easy challenges, Petey Piranha unlocked after completing all the normal ones, Bowser unlocked after completing all the hard ones and Toadsworth unlocked after completing all the expert ones.

Ranking mode- The character chosen starts at rank 20. They play against the other characters to ascend and possibly become rank 1 (top 3 opponents are Petey Piranha, Bowser, and Toadsworth in ascending order). Note that the ranking system works by winning points from beating other players; thus, the top opponents do not need to be unlocked in order to ascend above them.

Local multiplayer- A game for multiple players (up to 4), all within range of the DS wireless radio, DS Download play is available.

Online multiplayer- Like online multiplayer for other DS games, with the same Friend Code system. Voice chat is available.